Determination of fabricating orientation and packing in SLS process

Hur, Sung-Min; Choi, Kyung Hyun; Lee, Seok-Hee; Chang, Pok-Keun

doi:10.1016/s0924-0136(01)00581-7

Cited by 96 publications

(53 citation statements)

References 5 publications

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“…Researchers Hur, Choi, Lee and Chang [10] developed an algorithm to calculate the stair effect. Its task was to quantify procedural errors by the volume of material, which has to be removed or added to the components.…”

Section: Introductionmentioning

confidence: 99%

Accuracy Investigation of Features Produced by Additive Technology

Monková¹,

Monka²

2017

Proceedings of the 2017 2nd International Conference on Electrical, Automation and Mechanical Engineering (EAME 2017)

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Section: Introductionmentioning

confidence: 99%

Accuracy Investigation of Features Produced by Additive Technology

Monková¹,

Monka²

2017

Proceedings of the 2017 2nd International Conference on Electrical, Automation and Mechanical Engineering (EAME 2017)

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“…From a design perspective, the challenge of additive manufacturing is to understanding the limitations and opportunities of these new processes and to use them in the right applications. [2][3][4] Scientists at the Massachusetts Institute of Technology have discovered new ways to use complex geometry to make strong, lightweight shapes that might be useful as structural materials for airplanes, automobiles and buildings. Authors´ research deals with producing one type of regular porous structures -so called gyroid structure.…”

Section: Introductionmentioning

confidence: 99%

Influence of the volume ratio of solid phase on carrying capacity of regular porous structure

2017

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Abstract. Direct metal laser sintering is spread technology today. The main advantage of this method is the ability to produce parts which have a very complex geometry and which can be produced only in very complicated way by classical conventional methods. Special category of such components are parts with porous structure, which can give to the product extraordinary combination of properties. The article deals with some aspects that influence the manufacturing of regular porous structures in spite of the fact that input technological parameters at various samples were the same. The main goal of presented research has been to investigate the influence of the volume ratio of solid phase on carrying capacity of regular porous structure. Realized tests have indicated that the unit of regular porous structure with lower volume ratio is able to carry a greater load to failure than the unit with higher volume ratio.

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“…For rapid prototyping processes, build height is an index used to evaluate the manufacturability of a model on a particular rapid prototyping machine. Moreover, build height is also relevant to build time [11][12][13]. Chan and Tan [14] developed an algorithm to test if a 3D model will fit within a cylindrical volume.…”

Section: Introductionmentioning

confidence: 99%

“…The algorithm can be used to search for the building direction since both the minimum diameter cylinder and the minimum height cylinder can be determined. Optimizing build height is particularly important when packing multiple parts in one setup on a rapid prototyping machine [11,12], where the objective is to maximize the space utilization. Other criteria considered in choosing building direction include support structure, mechanical properties, trapped volumes, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Cheng et al [18] summarized the general attributes of an optimal building direction and presented a framework that optimizes each criterion sequentially. Hur et al [11] optimized the building direction and packing problem for selective laser sintering (SLS) process with the objectives on part height, build time, and surface quality. The orientation and packing optimization employed a modified bottom-left approach and was implemented in genetic algorithm (GA).…”

Section: Introductionmentioning

confidence: 99%

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Multi-criteria GA-based Pareto optimization of building direction for rapid prototyping

Zhang

2013

Int J Adv Manuf Technol

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Selection of a building direction is an important step for rapid prototyping regardless of the specific processes used to create the part. It involves the consideration of multi-factors that have influences on surface quality, build efficiency and support structure, etc. Contemporary approaches did not consider the global directional space to search for the optimal building direction. In this paper, we use a multi-sphere model for multi-criteria optimization of building direction in rapid prototyping. Each sphere represents the global directional space for one optimization criterion, and is obtained by uniformly discretizing the surface of a unit sphere. Optimization is then conducted over each discretized spherical surface for each criterion. Two objectives, theoretical volume deviation (TVD) and part height are simultaneously optimized using genetic algorithm. TVD is computed to evaluate the volumetric error along each building direction in a general way. The Pareto front is computed as well in order to study the competing effect from these two criteria. At the end of the paper, examples are presented to show the effectiveness of the method.

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Determination of fabricating orientation and packing in SLS process

Cited by 96 publications

References 5 publications

Accuracy Investigation of Features Produced by Additive Technology

Accuracy Investigation of Features Produced by Additive Technology

Influence of the volume ratio of solid phase on carrying capacity of regular porous structure

Multi-criteria GA-based Pareto optimization of building direction for rapid prototyping

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